Which of the following sets of compounds is N | vedclass

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(D) Electrophilic aromatic substitution reactivity depends on the electron density of the ring. Electron-donating groups $(EDG)$ increase reactivity,w

Vedclass · Accepted Answer

Benzoic acid $>$ phenol $> n$-propyl benzene

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(D) Electrophilic aromatic substitution reactivity depends on the electron density of the ring. Electron-donating groups $(EDG)$ increase reactivity,while electron-withdrawing groups $(EWG)$ decrease it.$(A)$ Halogens are deactivating but ortho/para directing. Reactivity decreases as electronegativity decreases: $F > Cl > Br$.$(B)$ Phenol ($-OH$ is strongly activating) $>$ $n$-propyl benzene (alkyl group is weakly activating) $>$ benzoic acid ($-COOH$ is strongly deactivating).$(C)$ $p$-chlorotoluene has an activating $-CH_3$ and deactivating $-Cl$. $p$-nitrotoluene has a deactivating $-NO_2$. $2$-chloro-$4$-nitrotoluene has two deactivating groups. The order is correct.$(D)$ Benzoic acid is the least reactive due to the $-COOH$ group. The correct order should be phenol $> n$-propyl benzene $>$ benzoic acid. Thus,option $D$ is not arranged in decreasing order.

Which of the following sets of compounds is $NOT$ arranged in the order of decreasing reactivity towards electrophilic aromatic substitution?

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